package cn.edu.neu.studentmsg_java.dao;

import cn.edu.neu.studentmsg_java.model.Classes;
import org.apache.ibatis.annotations.Mapper;

import java.util.List;

@Mapper
public interface ClassesDao {
    List<Integer> selectClassId();

    List<Classes> selectClassIdAndMajorName();

    int selectMajorIdByClassId(Integer class_id);
}
